Configuring Centralized Data Storage
If you want to store the TREX data centrally on a file server, specify this fact when configuring the landscape.
If you are using a file server, TREX automatically stores a topology file on the file server. The master name servers then share this topology and no longer use their local topology files.
This has the advantage that the master name servers do not need to synchronize their local topology files. In some circumstances, synchronization can cause a master name server to use an out-of-date topology file because it did not receive all of the changes.
Example: A host on which a master name server is running has not been in operation for some time. Its local topology file is therefore out-of-date. If you stop all TREX hosts and then start the master name server that has been out of operation first, the system will use its out-of-date topology file. If this happens, update the topology file manually using backup copies.
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Select Use a File Server.
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On all hosts, change the path specifications so that they reference the central TREX data directory on the file server:
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Select a host in the Hosts table.
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Enter the relevant central TREX data directory on the file server (UNIX) or network drive (Windows) in the Base Path column.
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UNIX: Individual hosts with a file server
You have created the central TREX data directory mytrexdir on the file server myfileserver. This directory is mounted at /mypath/mytrexdir on all TREX hosts. The path specifications are as follows:
|
Host |
Base Path |
|
mytrexhost_1 |
/mypath/mytrexdir |
|
... |
... |
|
mytrexhost_n |
/mypath/mytrexdir |
UNIX: Blade system with a file server
You have installed TREX in the directory usr/sap/trex_<instance_number> on the file server myfileserver. All server blades access this directory. The TREX data should be located in the installation directory. The path specifications are as follows:
|
Host |
Base Path |
|
mytrexhost_1 |
/usr/sap/ <SAPSID>/TRX<instance_number> |
|
... |
... |
|
mytrexhost_n |
/usr/sap/ <SAPSID>/TRX<instance_number> |
The default value for the base path must not be changed.
Windows: Individual hosts with a file server
You have created the central TREX data directory mytrexdir on the file server myfileserver. The directory is connected as the network drive T:. The path specifications are as follows:
|
Host |
Base Path |
|
mytrexhost_1 |
T: |
|
... |
... |
|
mytrexhost_n |
T: |